(kirtle, cotehardie, cote, gothic fitted dress, whatever you want to call it) The support layer. A dress worn over the smock. It supports and shapes the breasts. In middle/lower class this may be the only dress worn. The type of kirtle described here is appropriate for the late 15th/early 16th century (eg. 1480s-1540s possibly earlier/later). This is later (1540s and later) sometimes referred to as the petticoat.